Donald Trump today returned to his "rigged system" rhetoric as the Republican presidential candidate hit out at the FBI for giving a clean chit to Democratic rival Hillary Clinton, saying it is "impossible" to go through 650,000 emails in a little over a week.

“Right now, she is being protected by a rigged system. It’s a totally rigged system,” Trump told his supporters in a Detroit suburb in Michigan. (Reuters)

Donald Trump today returned to his “rigged system” rhetoric as the Republican presidential candidate hit out at the FBI for giving a clean chit to Democratic rival Hillary Clinton, saying it is “impossible” to go through 650,000 emails in a little over a week.

“Right now, she is being protected by a rigged system. It’s a totally rigged system,” Trump told his supporters in a Detroit suburb in Michigan.

The 70-year-old real estate tycoon’s remarks were his first reaction after the FBI Director Jim Comey said that it has not changed its view following a renewed probe into the alleged email scandal involving Clinton after it assessed new emails found in the laptop of one of her close aides.

It is reported that there were 650,000 emails in that laptop.

“Based on our review, we have not changed our conclusions that we expressed in July with respect to Secretary Clinton,” Comey told leaders of the US Congress in a letter.